gdb: switch to 7.7 as the default version

Now that gdb 7.8 is out, it's time to move to 7.7 as the default
version instead of 7.6.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gdb/Config.in.host

@@ -23,8 +23,7 @@ choice
 	depends on !BR2_arc
 	depends on !BR2_microblaze
 	default BR2_GDB_VERSION_6_7_1_AVR32_2_1_5 if BR2_avr32
-	default BR2_GDB_VERSION_7_7 if BR2_powerpc64le
-	default BR2_GDB_VERSION_7_6
+	default BR2_GDB_VERSION_7_7
 	help
 	  Select the version of gdb you wish to use.
 
@@ -54,6 +53,6 @@ config BR2_GDB_VERSION
                                    (!BR2_PACKAGE_HOST_GDB && BR2_avr32)
 	default "arc-2014.08-gdb" if BR2_arc
 	default "6be65fb56ea6694a9260733a536a023a1e2d4d57" if BR2_microblaze
-	default "7.6.2"    if BR2_GDB_VERSION_7_6 || !BR2_PACKAGE_HOST_GDB
-	default "7.7.1"    if BR2_GDB_VERSION_7_7 || BR2_powerpc64le
+	default "7.6.2"    if BR2_GDB_VERSION_7_6
+	default "7.7.1"    if BR2_GDB_VERSION_7_7 || !BR2_PACKAGE_HOST_GDB
 	default "7.8"	   if BR2_GDB_VERSION_7_8