[toolvers] bump gcc to 5.1.0, gdb to 7.9

Add ability to use ccache and turn off auto-fetching behavior
Remove old binutils patch that doesn't help any more.
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..09c354a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+archives
diff --git a/binutils-patch.txt b/binutils-patch.txt
index 19a3b3f..e69de29 100644
--- a/binutils-patch.txt
+++ b/binutils-patch.txt
@@ -1,14 +0,0 @@
-diff -ru binutils-2.22/bfd/elf32-arm.c binutils-2.22.patched/bfd/elf32-arm.c
---- binutils-2.22/bfd/elf32-arm.c	2011-11-21 01:29:13.000000000 -0800
-+++ binutils-2.22.patched/bfd/elf32-arm.c	2012-03-05 09:34:21.444536814 -0800
-@@ -15317,7 +15317,8 @@
- #ifdef __QNXTARGET__
- #define ELF_MAXPAGESIZE			0x1000
- #else
--#define ELF_MAXPAGESIZE			0x8000
-+//#define ELF_MAXPAGESIZE			0x8000
-+#define ELF_MAXPAGESIZE			0x1000 /* align to 4K boundaries by default */
- #endif
- #define ELF_MINPAGESIZE			0x1000
- #define ELF_COMMONPAGESIZE		0x1000
-Only in binutils-2.22.patched/bfd: elf32-arm.c.orig
diff --git a/doit b/doit
index 29b3399..be095be 100755
--- a/doit
+++ b/doit
@@ -4,10 +4,9 @@
 HOSTARCH=`uname -m`
 PARALLEL=-j8
 GNU_FTP=ftp://ftp.gnu.org/gnu
-FETCH=1
 ARCHIVES=archives
 
-if [ "x$ARCHES" = "x" ]; then
+if [ -z "$ARCHES" ]; then
     echo need to specify architectures to build in the ARCHES environment variable
     echo ie. ARCHES=\"arm sh\"
     exit 1
@@ -35,9 +34,20 @@
     HOSTARCH=x86_64
 fi
 
+export CC="cc"
+export CXX="c++"
+
+if [ "$CCACHE" = "1" ]; then
+export CC="ccache $CC"
+export CXX="ccache $CXX"
+fi
+
 # load GCCVER and BINVER
 . toolvers
 
+if [ -z "$FETCH" ]; then
+    FETCH=1
+fi
 if [ "$FETCH" = "1" ]; then
     if [ ! -f binutils-$BINVER.tar.bz2 ]; then
         wget -P $ARCHIVES -N $GNU_FTP/binutils/binutils-$BINVER.tar.bz2
diff --git a/toolvers b/toolvers
index e5d11cc..a43eab3 100644
--- a/toolvers
+++ b/toolvers
@@ -1,7 +1,7 @@
-GCCVER=4.9.2
-BINVER=2.24
-GDBVER=7.8.1
+GCCVER=5.1.0
+BINVER=2.25
+GDBVER=7.9
 GMPVER=5.1.3
-MPCVER=1.0.2
+MPCVER=1.0.3
 MPFRVER=3.1.2