kernel32: print a better error message if an executable can't be found in $PATH

[Austin English]

See bug 19074

-- 
-Austin
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diff --git a/dlls/kernel32/nls/winerr_enu.mc b/dlls/kernel32/nls/winerr_enu.mc
index c615e2a..98243a2 100644
--- a/dlls/kernel32/nls/winerr_enu.mc
+++ b/dlls/kernel32/nls/winerr_enu.mc
@@ -491,7 +491,7 @@ No volume label
 MessageId=126
 SymbolicName=ERROR_MOD_NOT_FOUND
 Language=ENU
-Module not found
+The specified program was not found in the current directory
 .
 MessageId=127
 SymbolicName=ERROR_PROC_NOT_FOUND