[builtins][test] Use architecture specific float16 check

[dcandler]

Summary

The COMPILER_RT_HAS_FLOAT16 cmake check is now set per architecture,
which needs to be reflected when building the tests.

Additionally added armhf to the architecture list.

[dim]

LGTM

compiler-rt/test/builtins/CMakeLists.txt

foreach(arch ${BUILTIN_TEST_ARCH})
 
   if (COMPILER_RT_ENABLE_SOFTWARE_INT128 OR ${arch} STREQUAL "riscv32")
     list(APPEND BUILTINS_TEST_TARGET_CFLAGS -fforce-enable-int128)
     string(REPLACE ";" " " BUILTINS_TEST_TARGET_CFLAGS "${BUILTINS_TEST_TARGET_CFLAGS}")
   endif()
 
   if(APPLE)
     # TODO: Support the new ABI on Apple platforms.
-    if (${arch} MATCHES "arm|aarch64|arm64" AND COMPILER_RT_HAS_FLOAT16)
+    if (${arch} MATCHES "arm|armhf|aarch64|arm64" AND COMPILER_RT_HAS_${arch}_FLOAT16)
       list(APPEND BUILTINS_TEST_TARGET_CFLAGS -DCOMPILER_RT_HAS_FLOAT16)
       string(REPLACE ";" " " BUILTINS_TEST_TARGET_CFLAGS "${BUILTINS_TEST_TARGET_CFLAGS}")
     endif()
   else()
-    if (${arch} MATCHES "arm|aarch64|arm64|i?86|x86_64|AMD64|riscv32|riscv64" AND COMPILER_RT_HAS_FLOAT16)
+    if (${arch} MATCHES "arm|armhf|aarch64|arm64|i?86|x86_64|AMD64|riscv32|riscv64" AND COMPILER_RT_HAS_${arch}_FLOAT16)
       list(APPEND BUILTINS_TEST_TARGET_CFLAGS -DCOMPILER_RT_HAS_FLOAT16)
       string(REPLACE ";" " " BUILTINS_TEST_TARGET_CFLAGS "${BUILTINS_TEST_TARGET_CFLAGS}")
     endif()
   endif()
 
   if(COMPILER_RT_ENABLE_CET)
     if(NOT arch MATCHES "i?86|x86_64|AMD64")
       message(SEND_ERROR "${arch} does not support CET")