process variable assignments with tabs as well

Change-Id: If3caa4094aa9d8caefc9829bfea44426d59477d1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

diff --git a/configure b/configure
index 5df1edf..f4743c2 100755 (executable)
--- a/configure
+++ b/configure
@@ -134,7 +134,7 @@ BEGIN {
     values["LITERAL_WHITESPACE"] = " "
     values["LITERAL_DOLLAR"] = "$"
 }
-/^[_A-Z0-9.]+ *\+?=/ {
+/^[_A-Z0-9.]+[ \t]*\+?=/ {
     valStart = index($0, "=") + 1
 
     append = 0