libcprops: fix musl

srcpkgs/libcprops/patches/musl.patch

@@ -0,0 +1,20 @@
+--- util.c.orig	2012-01-13 23:25:58.000000000 +0100
++++ util.c	2018-05-26 20:14:12.290726591 +0200
+@@ -386,7 +386,7 @@
+ 			msg = "Invalid back reference to a subexpression.";
+ 			break;
+ 
+-#ifdef linux
++#ifdef __GLIBC__
+ 		case REG_EEND:
+ 			msg = "Non specific error.";
+ 			break;
+@@ -400,7 +400,7 @@
+ 			msg = "Invalid use of pattern operators such as group or list.";
+ 			break;
+ 
+-#ifdef linux
++#ifdef __GLIBC__
+ 		case REG_ESIZE:
+ 			msg = "Compiled regular expression requires a pattern buffer larger than  64Kb.";
+ 			break;