convertRelease: Restore $Bin to @INC

This is needed when convertRelease.pl gets run before the
EPICS::Path and EPICS::Release modules are installed, and
after 'make uninstall' has deleted the lib/perl directory.

configure/CONFIG

@@ -58,12 +58,8 @@ include $(CONFIG)/CONFIG_BASE_VERSION
 include $(CONFIG)/os/CONFIG.$(EPICS_HOST_ARCH).Common
 -include $(CONFIG)/os/CONFIG_SITE.$(EPICS_HOST_ARCH).Common
 
-# Parse configure/RELEASE
-# except when building Base itself, where this file is empty,
-# and would error in src/tools/ anyway.
-ifndef BASE_TOP
+# Parse configure/RELEASE to find all upstream modules
 RELEASE_TOPS := $(shell $(CONVERTRELEASE) -T $(TOP) releaseTops)
-endif
 
 ifdef T_A
 

src/tools/convertRelease.pl

@@ -19,7 +19,7 @@ use Getopt::Std;
 $Getopt::Std::STANDARD_HELP_VERSION = 1;
 
 use FindBin qw($Bin);
-use lib ("$Bin/../../lib/perl");
+use lib ("$Bin/../../lib/perl", $Bin);
 
 use EPICS::Path;
 use EPICS::Release;