musl only uses rlib files for stdlib linking

Author: aidanhs

mk/cfg/x86_64-unknown-linux-musl.mk

@@ -3,6 +3,7 @@ CC_x86_64-unknown-linux-musl=$(CFG_MUSL_ROOT)/bin/musl-gcc
 CXX_x86_64-unknown-linux-musl=notaprogram
 CPP_x86_64-unknown-linux-musl=$(CFG_MUSL_ROOT)/bin/musl-gcc -E
 AR_x86_64-unknown-linux-musl=$(AR)
+CFG_INSTALL_ONLY_RLIB_x86_64-unknown-linux-musl = 1
 CFG_LIB_NAME_x86_64-unknown-linux-musl=lib$(1).so
 CFG_STATIC_LIB_NAME_x86_64-unknown-linux-musl=lib$(1).a
 CFG_LIB_GLOB_x86_64-unknown-linux-musl=lib$(1)-*.so