Two fixes

Fixes airless turf in Fore Starboard Solar Control causing minor atmos alert at roundstart
Fixes clean_map_git.sh being set non-executable and using non-sh-compatible features with #!/bin/sh

tools/mapmerge/clean_map_git.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 for i in {1..6}
 do
@@ -7,4 +7,4 @@ do
 	git show HEAD:maps/$MAPFILE > tmp.dmm
 	java -jar MapPatcher.jar -clean tmp.dmm '../../maps/'$MAPFILE '../../maps/'$MAPFILE
 	rm tmp.dmm
-done
+done