Fixes this error when building with Clang 3.7.1:
fatal error: error in backend: unsupported relocation on symbol
x86_64-pc-linux-gnu-clang-3.7: error: clang frontend command failed with exit code 70 (use -v to see invocation)
clang version 3.7.1 (tags/RELEASE_371/final)
Target: arm-none--eabi
Thread model: posix
x86_64-pc-linux-gnu-clang-3.7: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script.
x86_64-pc-linux-gnu-clang-3.7: note: diagnostic msg:
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PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
x86_64-pc-linux-gnu-clang-3.7: note: diagnostic msg: /tmp/vectors_cortexm-54333e.c
x86_64-pc-linux-gnu-clang-3.7: note: diagnostic msg: /tmp/vectors_cortexm-54333e.sh
x86_64-pc-linux-gnu-clang-3.7: note: diagnostic msg:
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