[lldb] Tentative attempt to fix command-target-create-resolve-exe.test on buildbot

This test does succeed in my local test environment though, but
fails on the buildbot.

Author: mstorsjo

lldb/test/Shell/Commands/command-target-create-resolve-exe.test

@@ -12,10 +12,10 @@
 # RUN: %lldb %t.dir/testmain.exe -b | FileCheck %s
 
 ## Test with exe on path, with .exe suffix
-# RUN: env "PATH=%t.dir;%PATH%" %lldb testmain.exe -b | FileCheck %s
+# RUN: env PATH="%t.dir;$PATH" %lldb testmain.exe -b | FileCheck %s
 
 ## Test with exe on path, without .exe suffix
-# RUN: env "PATH=%t.dir;%PATH%" %lldb testmain -b | FileCheck %s
+# RUN: env PATH="%t.dir;$PATH" %lldb testmain -b | FileCheck %s
 
 ## Test in cwd, with .exe suffix
 # RUN: cd "%t.dir" && %lldb testmain.exe -b | FileCheck %s