[Static SDK for Linux] Turn off the CTX_PROFILE option in compiler-rt. (#424)

We've got the sanitizers disabled, so the CTX_PROFILE option won't work
either.  It'd be nice if the compiler-rt CMake script knew that, but
it doesn't.

rdar://137610887

Author: al45tair

swift-ci/sdks/static-linux/scripts/build.sh

@@ -429,6 +429,7 @@ EOF
         -DCOMPILER_RT_BUILD_MEMPROF=OFF \
         -DCOMPILER_RT_BUILD_PROFILE=OFF \
         -DCOMPILER_RT_BUILD_SANITIZERS=OFF \
+        -DCOMPILER_RT_BUILD_CTX_PROFILE=OFF \
         -DCOMPILER_RT_BUILD_XRAY=OFF \
         -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON \
         -DCOMPILER_RT_BUILD_ORC=OFF \