glib-2.0.m4: Use unsigned variables for version numbers
glib-2.0.m4: Use unsigned variables for version numbers

When using signed, we get complaints from gcc about comparing signed to
unsigned with -Wsign-compare. And combined with -Werror in users' CFLAGS
it breaks configure runs.

ahmedammar/platform_external_gst_glib,johne53/MB3Glib,zsx/glib,krichter722/glib,Distrotech/glib,bluez-android/glib,mzabaluev/glib,darren-clark/android_platform_external_bluetooth_glib,antono/glib,ahmedammar/platform_external_gst_glib,darren-clark/android_platform_external_bluetooth_glib,justinkb/aosp-bluez.glib,lukasz-skalski/glib,gale320/glib,bluez-android/glib,darren-clark/android_platform_external_bluetooth_glib,cention-sany/glib,cention-sany/glib,mzabaluev/glib,pstglia/external-bluetooth-glib,cosimoc/glib,johne53/MB3Glib,MathieuDuponchelle/glib,pstglia/platform-external-bluetooth-glib,djdeath/glib,MathieuDuponchelle/glib,ahmedammar/platform_external_gst_glib,iConsole/Console-OS_external_bluetooth_glib,bluez-android/glib,antono/glib,justinkb/aosp-bluez.glib,krichter722/glib,MathieuDuponchelle/glib,iConsole/Console-OS_external_bluetooth_glib,MathieuDuponchelle/glib,cention-sany/glib,endlessm/glib,cosimoc/glib,cention-sany/glib,tchakabam/glib,tamaskenez/glib,endlessm/glib,pstglia/platform-external-bluetooth-glib,pstglia/external-bluetooth-glib,gale320/glib,krichter722/glib,ieei/glib,ieei/glib,Distrotech/glib,endlessm/glib,zsx/glib,djdeath/glib,MathieuDuponchelle/glib,djdeath/glib,lukasz-skalski/glib,gale320/glib,cosimoc/glib,tamaskenez/glib,01org/android-bluez-glib,pstglia/external-bluetooth-glib,mzabaluev/glib,bluez-android/glib,gale320/glib,krichter722/glib,tamaskenez/glib,mzabaluev/glib,bluez-android/glib,ieei/glib,antono/glib,01org/android-bluez-glib,zsx/glib,endlessm/glib,cention-sany/glib,justinkb/aosp-bluez.glib,tchakabam/glib,justinkb/aosp-bluez.glib,tamaskenez/glib,01org/android-bluez-glib,justinkb/aosp-bluez.glib,bratsche/glib,lukasz-skalski/glib,ieei/glib,tchakabam/glib,iConsole/Console-OS_external_bluetooth_glib,pstglia/external-bluetooth-glib,ahmedammar/platform_external_gst_glib,Distrotech/glib,djdeath/glib,bratsche/glib,darren-clark/android_platform_external_bluetooth_glib,johne53/MB3Glib,krichter722/glib,bratsche/glib,01org/android-bluez-glib,zsx/glib,lukasz-skalski/glib,ieei/glib,cosimoc/glib,pstglia/platform-external-bluetooth-glib,tamaskenez/glib,01org/android-bluez-glib,tchakabam/glib,Distrotech/glib,djdeath/glib,tchakabam/glib,Distrotech/glib,mzabaluev/glib,gale320/glib,pstglia/platform-external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib,pstglia/platform-external-bluetooth-glib,johne53/MB3Glib,lukasz-skalski/glib,endlessm/glib,johne53/MB3Glib,darren-clark/android_platform_external_bluetooth_glib,johne53/MB3Glib,cosimoc/glib,pstglia/external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib,bratsche/glib,antono/glib