Don't use the target perl when regenerating the man pages.

Upstream-Status: Inappropriate
Signed-off-by: Ross Burton <ross.burton@arm.com>

diff --git a/man/local.mk b/man/local.mk
index e69858b1..78c68ab5 100644
--- a/man/local.mk
+++ b/man/local.mk
@@ -67,13 +67,12 @@ SUFFIXES += .w .1
 	@echo "Updating man page $@"
 	$(MKDIR_P) $(@D)
 	PATH="$(top_srcdir)/man$(PATH_SEPARATOR)$$PATH"; \
-	PERL="$(PERL)"; \
 	PACKAGE_NAME="$(PACKAGE_NAME)"; \
 	VERSION="$(VERSION)"; \
 	RELEASE_YEAR="$(RELEASE_YEAR)"; \
 	top_srcdir="$(top_srcdir)"; \
 	channeldefs_pm="$(channeldefs_pm)"; \
-	export PATH PERL PACKAGE_NAME VERSION RELEASE_YEAR; \
+	export PATH PACKAGE_NAME VERSION RELEASE_YEAR; \
 	export top_srcdir channeldefs_pm; \
 	$(HELP2MAN) \
 	    --include=$(srcdir)/$*.x \