Support time >= 0.3.11 with gcc

[mkroening]

From hermit-os/hermit-gcc#25 (comment).

Error:

...
checking for x86_64-hermit-gcc... /build/tmp/gcc/./gcc/xgcc -B/build/tmp/gcc/./gcc/ -B/opt/hermit/x86_64-hermit/bin/ -B/opt/hermit/x86_64-hermit/lib/ -isystem /opt/hermit/x86_64-hermit/include -isystem /opt/hermit/x86_64-hermit/sys-include   
checking for C compiler default output file name... 
configure: error: in `/build/tmp/gcc/x86_64-hermit/libgomp':
configure: error: C compiler cannot create executables
See `config.log' for more details.
make[1]: *** [Makefile:15145: configure-target-libgomp] Error 1
make[1]: Leaving directory '/build/tmp/gcc'
make[1]: Entering directory '/build/tmp/gcc'
...

/build/tmp/gcc/x86_64-hermit/libgomp/config.log:

...
configure:3709: checking for C compiler default output file name
configure:3731: /build/tmp/gcc/./gcc/xgcc -B/build/tmp/gcc/./gcc/ -B/opt/hermit/x86_64-hermit/bin/ -B/opt/hermit/x86_64-hermit/lib/ -isystem /opt/hermit/x86_64-hermit/include -isystem /opt/hermit/x86_64-hermit/sys-include    -m64 -O3   conftest.c  >&5
/opt/hermit/x86_64-hermit/bin/ld: /opt/hermit/x86_64-hermit/lib/libhermit.a(time-ec008b51df40b55c.time.b046ec56-cgu.1.rcgu.o): in function `libhermit__ZN4time8duration8Duration11seconds_f6417h2ce9577e71660f81E':
libhermit_time.b046ec56-cgu.1:(.text._ZN4time8duration8Duration11seconds_f6417h2ce9577e71660f81E+0xd7): undefined reference to `libhermit_fmod'
/opt/hermit/x86_64-hermit/bin/ld: /opt/hermit/x86_64-hermit/lib/libhermit.a(time-ec008b51df40b55c.time.b046ec56-cgu.1.rcgu.o): in function `libhermit__ZN4time8duration8Duration11seconds_f3217hf10b40a65964be25E':
libhermit_time.b046ec56-cgu.1:(.text._ZN4time8duration8Duration11seconds_f3217hf10b40a65964be25E+0xb3): undefined reference to `libhermit_fmodf'
/opt/hermit/x86_64-hermit/bin/ld: /opt/hermit/x86_64-hermit/lib/libhermit.a(time-ec008b51df40b55c.time.b046ec56-cgu.1.rcgu.o): in function `libhermit__ZN77_$LT$time..duration..Duration$u20$as$u20$core..ops..arith..Mul$LT$f32$GT$$GT$3mul17hdba7c0d172164684E':
libhermit_time.b046ec56-cgu.1:(.text._ZN77_$LT$time..duration..Duration$u20$as$u20$core..ops..arith..Mul$LT$f32$GT$$GT$3mul17hdba7c0d172164684E+0xee): undefined reference to `libhermit_fmodf'
/opt/hermit/x86_64-hermit/bin/ld: /opt/hermit/x86_64-hermit/lib/libhermit.a(time-ec008b51df40b55c.time.b046ec56-cgu.1.rcgu.o): in function `libhermit__ZN77_$LT$time..duration..Duration$u20$as$u20$core..ops..arith..Mul$LT$f64$GT$$GT$3mul17hf977b082e0d2e285E':
libhermit_time.b046ec56-cgu.1:(.text._ZN77_$LT$time..duration..Duration$u20$as$u20$core..ops..arith..Mul$LT$f64$GT$$GT$3mul17hf977b082e0d2e285E+0x11c): undefined reference to `libhermit_fmod'
/opt/hermit/x86_64-hermit/bin/ld: /opt/hermit/x86_64-hermit/lib/libhermit.a(time-ec008b51df40b55c.time.b046ec56-cgu.1.rcgu.o): in function `libhermit__ZN77_$LT$time..duration..Duration$u20$as$u20$core..ops..arith..Div$LT$f32$GT$$GT$3div17h189f18d044cf36e7E':
libhermit_time.b046ec56-cgu.1:(.text._ZN77_$LT$time..duration..Duration$u20$as$u20$core..ops..arith..Div$LT$f32$GT$$GT$3div17h189f18d044cf36e7E+0xed): undefined reference to `libhermit_fmodf'
/opt/hermit/x86_64-hermit/bin/ld: /opt/hermit/x86_64-hermit/lib/libhermit.a(time-ec008b51df40b55c.time.b046ec56-cgu.1.rcgu.o): in function `libhermit__ZN77_$LT$time..duration..Duration$u20$as$u20$core..ops..arith..Div$LT$f64$GT$$GT$3div17he68d88f5bcfc8edbE':
libhermit_time.b046ec56-cgu.1:(.text._ZN77_$LT$time..duration..Duration$u20$as$u20$core..ops..arith..Div$LT$f64$GT$$GT$3div17he68d88f5bcfc8edbE+0x11b): undefined reference to `libhermit_fmod'
collect2: error: ld returned 1 exit status
configure:3735: $? = 1
configure:3772: result: 
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU Offloading and Multi Processing Runtime Library"
| #define PACKAGE_TARNAME "libgomp"
| #define PACKAGE_VERSION "1.0"
| #define PACKAGE_STRING "GNU Offloading and Multi Processing Runtime Library 1.0"
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL "http://www.gnu.org/software/libgomp/"
| #define PACKAGE "libgomp"
| #define VERSION "1.0"
| /* end confdefs.h.  */
| 
| int
| main ()
| {
| 
|   ;
|   return 0;
| }
configure:3778: error: in `/build/tmp/gcc/x86_64-hermit/libgomp':
configure:3782: error: C compiler cannot create executables
See `config.log' for more details.
...

[mkroening]

This depends on rust-lang/compiler-builtins#509.