gresource-tool: include sys/mman.h conditionally
gresource-tool: include sys/mman.h conditionally

It's only needed for code guarded by HAVE_LIBELF, so ifdef the include
as well.

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