x86: fix clang .macro retention check

There were two problems here: The first closing parentheses got parsed
by make to end the $(call invocation, and the escaping of the quotes
wasn't right either, as there's nowhere they would get un-escaped.

Furthermore there appears to be a puzzling problem with \n getting
expanded to an actual newline too early in some environments. Convert
these to semicolons at the same time.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Tested-by: Roger Pau Monné <roger.pau@citrix.com> [On FreeBSD and Debian 9.5]
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/Config.mk b/Config.mk
index 0fa4591379..4735a1bfd0 100644
--- a/Config.mk
+++ b/Config.mk
@@ -6,6 +6,8 @@ endif
 
 # Convenient variables
 comma   := ,
+open    := (
+close   := )
 squote  := '
 #' Balancing squote, to help syntax highlighting
 empty   :=