Packages glshim

Created by: steamp0rt

Packages glshim. Execinfo/backtracing will NOT WORK due to limitations of musl

aports/main/glshim/001-no_execinfo.patch

+From 6e4e4cea845fa08850753748c1453520609cfefb Mon Sep 17 00:00:00 2001
+From: MoreRobustThanYou <MoreRobustThanYou@users.noreply.github.com>
+Date: Thu, 28 Dec 2017 19:34:21 -0500
+Subject: [PATCH] Backtrace only if there is backtrace support
+
+---
+ src/glx/glx.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/src/glx/glx.c b/src/glx/glx.c
+index a8622eda..45f8a4af 100644
+--- a/src/glx/glx.c
++++ b/src/glx/glx.c
+@@ -2,7 +2,9 @@
+ #include <linux/fb.h>
+ #endif
+ 
++#if defined(HAVE_BACKTRACE)
+ #include <execinfo.h>
++#endif
+ #include <fcntl.h>
+ #include <signal.h>
+ #include <stdlib.h>
+@@ -187,6 +189,7 @@ static void signal_handler(int sig) {
+         bcm_host_deinit();
+     }
+ 
++    #if defined(HAVE_BACKTRACE)
+     if (g_stacktrace) {
+         switch (sig) {
+             case SIGBUS:
+@@ -205,6 +208,7 @@ static void signal_handler(int sig) {
+             }
+         }
+     }
++    #endif  // defined(HAVE_BACKTRACE)
+     signal(sig, SIG_DFL);
+     raise(sig);
+ }