abuild: add -K for keeping tempdirs and deps

abuild.in

@@ -2041,6 +2041,7 @@ Options:
  -h  Show this help
  -i  Install PKG after successful build
  -k  Keep built packages, even if APKBUILD or sources are newer
+ -K  Keep buildtime temp dirs and files (srcdir/pkgdir/deps)
  -m  Disable colors (monochrome)
  -p  Set package destination directory
  -P  Set PKGDEST to REPODEST/<repo>/\$CARCH, where repo is the parents dir name
@@ -2080,7 +2081,7 @@ EOF
 APKBUILD="${APKBUILD:-./APKBUILD}"
 unset force
 unset recursive
-while getopts "AcdfFhi:kimnp:P:qrRs:u" opt; do
+while getopts "AcdfFhi:kKimnp:P:qrRs:u" opt; do
 	case $opt in
 		'A') echo "$CARCH"; exit 0;;
 		'c') enable_colors
@@ -2091,6 +2092,7 @@ while getopts "AcdfFhi:kimnp:P:qrRs:u" opt; do
 		'h') usage;;
 		'i') install_after="$install_after $OPTARG";;
 		'k') keep="-k";;
+		'K') CLEANUP="" ERROR_CLEANUP="" ;;
 		'm') disable_colors
 		     color_opt="-m";;
 		'n') die "Use newapkbuild to create new aports";;