CMake: Build fix.

Do not match the trailing '\n' in the regular expression as this would
make us dump a ) parenthesis on a new line.

This fixes the following error:

would get transformed into:

)

Bug: http://curl.haxx.se/mail/lib-2010-10/0065.html
Reported by: Dimitre Dimitrov
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a9bde71..244085b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -831,7 +831,7 @@
   string(REPLACE "$(top_builddir)" "\${CURL_BINARY_DIR}" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
 
   string(REGEX REPLACE "\\\\\n" "§!§" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
-  string(REGEX REPLACE "([a-zA-Z_][a-zA-Z0-9_]*)[\t ]*=[\t ]*([^\n]*\n)" "SET(\\1 \\2)\n" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
+  string(REGEX REPLACE "([a-zA-Z_][a-zA-Z0-9_]*)[\t ]*=[\t ]*([^\n]*)" "SET(\\1 \\2)" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
   string(REPLACE "§!§" "\n" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})
 
   string(REGEX REPLACE "\\$\\(([a-zA-Z_][a-zA-Z0-9_]*)\\)" "\${\\1}" MAKEFILE_INC_TEXT ${MAKEFILE_INC_TEXT})    # Replace $() with ${}