clang.inc: Specify ldso when using usrmerge

This matches the expectations of distro setups and clang's understanding
of what the ldso should look like

(From OE-Core rev: 2e95208253211872a501407a1180dc192a634195)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/conf/toolchain/clang.inc

@@ -23,3 +23,8 @@ PREFERRED_PROVIDER_virtual/cross-c++:class-nativesdk = "gcc-crosssdk-${SDK_SYS}"
 PREFERRED_PROVIDER_virtual/nativesdk-cross-cc = "gcc-crosssdk-${SDK_SYS}"
 PREFERRED_PROVIDER_virtual/nativesdk-cross-c++ = "gcc-crosssdk-${SDK_SYS}"
 PREFERRED_PROVIDER_virtual/nativesdk-compilerlibs = "nativesdk-gcc-runtime"
+
+TUNE_CCARGS += "${@bb.utils.contains("DISTRO_FEATURES", "usrmerge", " --dyld-prefix=/usr", "", d)}"
+
+LDFLAGS:append:class-nativesdk:x86-64 = " -Wl,-dynamic-linker,${base_libdir}/ld-linux-x86-64.so.2"
+LDFLAGS:append:class-nativesdk:aarch64 = " -Wl,-dynamic-linker,${base_libdir}/ld-linux-aarch64.so.1"