Move __aeabi_ which are not in libgcc.a to LIBC

The following arm symbols should be exported by libc.so:
    __aeabi_atexit; # arm
    __aeabi_memclr; # arm
    __aeabi_memclr4; # arm
    __aeabi_memclr8; # arm
    __aeabi_memcpy; # arm
    __aeabi_memcpy4; # arm
    __aeabi_memcpy8; # arm
    __aeabi_memmove; # arm
    __aeabi_memmove4; # arm
    __aeabi_memmove8; # arm
    __aeabi_memset; # arm
    __aeabi_memset4; # arm
    __aeabi_memset8; # arm

Bug: android/ndk#1
Change-Id: I542d1ad023b8aece5dc05a28a9ca549cb51455b4

Author: dimitry-

Diff for: libc/libc.map.txt

@@ -1,5 +1,18 @@
 LIBC {
   global:
+    __aeabi_atexit; # arm
+    __aeabi_memclr; # arm
+    __aeabi_memclr4; # arm
+    __aeabi_memclr8; # arm
+    __aeabi_memcpy; # arm
+    __aeabi_memcpy4; # arm
+    __aeabi_memcpy8; # arm
+    __aeabi_memmove; # arm
+    __aeabi_memmove4; # arm
+    __aeabi_memmove8; # arm
+    __aeabi_memset; # arm
+    __aeabi_memset4; # arm
+    __aeabi_memset8; # arm
     __assert;
     __assert2;
     __atomic_cmpxchg; # arm
@@ -1283,7 +1296,6 @@ LIBC_PRIVATE {
     __accept4; # arm x86 mips
     __adddf3; # arm
     __addsf3; # arm
-    __aeabi_atexit; # arm
     __aeabi_cdcmpeq; # arm
     __aeabi_cdcmple; # arm
     __aeabi_cdrcmple; # arm
@@ -1322,18 +1334,6 @@ LIBC_PRIVATE {
     __aeabi_llsl; # arm
     __aeabi_llsr; # arm
     __aeabi_lmul; # arm
-    __aeabi_memclr; # arm
-    __aeabi_memclr4; # arm
-    __aeabi_memclr8; # arm
-    __aeabi_memcpy; # arm
-    __aeabi_memcpy4; # arm
-    __aeabi_memcpy8; # arm
-    __aeabi_memmove; # arm
-    __aeabi_memmove4; # arm
-    __aeabi_memmove8; # arm
-    __aeabi_memset; # arm
-    __aeabi_memset4; # arm
-    __aeabi_memset8; # arm
     __aeabi_ui2d; # arm
     __aeabi_ui2f; # arm
     __aeabi_uidiv; # arm