compiler-rt: Fix arch detection for ppc64le

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D110377

(cherry picked from commit 05c21f5)

Author: tstellar

compiler-rt/cmake/base-config-ix.cmake

@@ -204,7 +204,7 @@ macro(test_targets)
           test_target_arch(x86_64 "" "")
         endif()
       endif()
-    elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc64le")
+    elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc64le|ppc64le")
       test_target_arch(powerpc64le "" "-m64")
     elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "powerpc")
       if(CMAKE_SYSTEM_NAME MATCHES "AIX")