improve printf tests coverage
improve printf tests coverage

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