For libm, use a macro for aliasing symbols.

Change-Id: Ibd42ebc387c2bf3eba9aa96091770915b4b34184
diff --git a/libm/x86/e_asin.S b/libm/x86/e_asin.S
index 99dfb68..5d7f331 100644
--- a/libm/x86/e_asin.S
+++ b/libm/x86/e_asin.S
@@ -466,8 +466,7 @@
 # -- End  asin
 
 # Start file scope ASM
-.weak asinl
-.equ asinl, asin
+ALIAS_SYMBOL(asinl, asin);
 # End file scope ASM
 	.section .rodata, "a"
 	.align 16