build-llvm: Set CMAKE_STRIP when cross compiling with Clang

If using Clang from /usr/bin, this makes it clear to CMake to use
$HOST-strip, as it otherwise may pick plain /usr/bin/strip, which
may not be able to strip the cross built executables.

build-llvm.sh

@@ -194,6 +194,9 @@ if [ -n "$HOST" ]; then
         CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_ASM_COMPILER_TARGET=$HOST"
         CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_C_COMPILER_TARGET=$HOST"
         CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_CXX_COMPILER_TARGET=$HOST"
+        if command -v $HOST-strip >/dev/null; then
+            CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_STRIP=$(command -v $HOST-strip)"
+        fi
     else
         CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_C_COMPILER=$HOST-gcc"
         CMAKEFLAGS="$CMAKEFLAGS -DCMAKE_CXX_COMPILER=$HOST-g++"