libc: simplify ssse3 detection

Since ssse3 is required as part of Android's ABI, even for 32-bit x86
(https://developer.android.com/ndk/guides/abis#sa), we can simplify
these ifuncs away.

Bug: 358360849
Test: mma
Change-Id: Ife68c7f492cc1b179aa332c12ab35b2ad6b9795a
diff --git a/libc/arch-x86/string/ssse3-strlcpy-atom.S b/libc/arch-x86/string/ssse3-strlcpy-atom.S
index 1671da6..cdb17cc 100644
--- a/libc/arch-x86/string/ssse3-strlcpy-atom.S
+++ b/libc/arch-x86/string/ssse3-strlcpy-atom.S
@@ -29,8 +29,8 @@
 */
 
 #define USE_AS_STRNCPY
-#define STRCPY strlcpy_ssse3
-#define STRLEN strlcpy_ssse3
+#define STRCPY strlcpy
+#define STRLEN strlcpy
 #define USE_AS_STRLCPY
 #include "ssse3-strcpy-atom.S"