Upgraded gcc from 5.0.0 to 5.1.0

etc/config/settings.csh

@@ -238,8 +238,8 @@ case ThirdParty:
         set mpfr_version=mpfr-3.1.2
         set mpc_version=mpc-1.0.1
         breaksw
-    case Gcc50:
-        set gcc_version=gcc-5.0.0
+    case Gcc51:
+        set gcc_version=gcc-5.1.0
         set gmp_version=gmp-5.1.2
         set mpfr_version=mpfr-3.1.2
         set mpc_version=mpc-1.0.1

etc/config/settings.sh

@@ -263,8 +263,8 @@ OpenFOAM | ThirdParty)
         mpfr_version=mpfr-3.1.2
         mpc_version=mpc-1.0.1
         ;;
-    Gcc50)
-        gcc_version=gcc-5.0.0
+    Gcc51)
+        gcc_version=gcc-5.1.0
         gmp_version=gmp-5.1.2
         mpfr_version=mpfr-3.1.2
         mpc_version=mpc-1.0.1