libressl: musl build patch from sabotage.

srcpkgs/libressl/patches/libressl-glibc.patch

@@ -0,0 +1,32 @@
+--- crypto/compat/issetugid_linux.c
++++ crypto/compat/issetugid_linux.c
+@@ -4,7 +4,9 @@
+  */
+ 
+ #include <errno.h>
++#ifdef __GLIBC__
+ #include <gnu/libc-version.h>
++#endif
+ #include <string.h>
+ #include <sys/types.h>
+ #include <unistd.h>
+@@ -33,15 +35,19 @@
+ 	 * info: http://lwn.net/Articles/519085/
+ 	 *
+ 	 */
++#ifdef __GLIBC__
+ 	const char *glcv = gnu_get_libc_version();
+ 	if (strverscmp(glcv, "2.19") >= 0) {
++#endif
+ 		errno = 0;
+ 		if (getauxval(AT_SECURE) == 0) {
+ 			if (errno != ENOENT) {
+ 				return 0;
+ 			}
+ 		}
++#ifdef __GLIBC__
+ 	}
++#endif
+ #endif
+ 	return 1;
+ }