Auto-increment build-extra version

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

git-extra/PKGBUILD

@@ -2,7 +2,7 @@
 
 pkgname=('git-extra')
 _ver_base=1.1
-pkgver=1.1.49.dbbb587
+pkgver=1.1.50.88c1c8a
 pkgrel=1
 pkgdesc="Git for Windows extra files"
 arch=('i686' 'x86_64')