giflib: bump version.

* remove patchset.

media-libs/giflib/patches/giflib-5.1.0.patchset

@@ -1,29 +0,0 @@
-From 1f7529dc2a255afb5d1ece8719761a13901751dd Mon Sep 17 00:00:00 2001
-From: Jerome Duval <jerome.duval@gmail.com>
-Date: Tue, 10 Jun 2014 16:43:15 +0000
-Subject: gcc2 patch
-
-
-diff --git a/util/gifinto.c b/util/gifinto.c
-index 1553dec..31d3548 100644
---- a/util/gifinto.c
-+++ b/util/gifinto.c
-@@ -70,6 +70,7 @@ mkstemp(char *tpl)
- ******************************************************************************/
- int main(int argc, char **argv)
- {
-+    int FD;
-     int	NumFiles;
-     bool Error, MinSizeFlag = false, HelpFlag = false;
-     char **FileName = NULL, FoutTmpName[STRLEN], FullPath[STRLEN], *p;
-@@ -126,7 +127,6 @@ int main(int argc, char **argv)
-     /* then add a name for the tempfile */
-     if ( (strlen(FoutTmpName) + strlen(DEFAULT_TMP_NAME))  > STRLEN-1 ) GIF_EXIT("Filename too long.");
-     strcat(FoutTmpName, DEFAULT_TMP_NAME);
--    int FD;
- #ifdef _WIN32
-     char *tmpFN = _mktemp(FoutTmpName);
-     if (tmpFN)
--- 
-1.8.3.4
-