add -F before -e to fix error when building Blosc

error is: could not spawn `echo 1.5.0`: no such file or directory (ENOENT)

echo.exe is in the Git/bin directory under the Julia install, which gets added to the path by juliarc.jl
so need to include juliarc.jl before evaluating Pkg.build

appveyor.yml

@@ -12,7 +12,7 @@ install:
 build_script:
 # Need to convert from shallow to complete for Pkg.clone to work
   - IF EXIST .git\shallow (git fetch --unshallow)
-  - C:\projects\julia\bin\julia -e "versioninfo(); Pkg.init(); Pkg.add(\"DataFrames\"); Pkg.clone(pwd(), \"HDF5\"); Pkg.build(\"HDF5\")"
+  - C:\projects\julia\bin\julia -F -e "versioninfo(); Pkg.init(); Pkg.add(\"DataFrames\"); Pkg.clone(pwd(), \"HDF5\"); Pkg.build(\"HDF5\")"
 
 test_script:
   - C:\projects\julia\bin\julia test\runtests.jl