libconfig: fix debuginfo package. Thx @alaviss! (see #2291)

* Add cmd:autoreconf to BUILD_PREREQUIRES.
* Don't pass --disable-dependency-tracking to configure.

dev-libs/libconfig/libconfig-1.7.2.recipe

@@ -6,7 +6,7 @@ systems like handheld devices."
 HOMEPAGE="https://www.hyperrealm.com/libconfig/"
 COPYRIGHT="2005-2018 Mark A Lindner"
 LICENSE="GNU LGPL v3"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://github.com/hyperrealm/libconfig/archive/v$portVersion.tar.gz"
 CHECKSUM_SHA256="f67ac44099916ae260a6c9e290a90809e7d782d96cdd462cac656ebc5b685726"
 SOURCE_FILENAME="libconfig-$portVersion.tar.gz"
@@ -40,8 +40,8 @@ BUILD_REQUIRES="
 	"
 BUILD_PREREQUIRES="
 	cmd:aclocal
-	cmd:autoconf
 	cmd:automake
+	cmd:autoreconf
 	cmd:bison
 	cmd:flex
 	cmd:g++$secondaryArchSuffix
@@ -52,13 +52,13 @@ BUILD_PREREQUIRES="
 	"
 
 defineDebugInfoPackage libconfig$secondaryArchSuffix \
-	"$libDir"/libconfig.so.$libVersion
+	"$libDir"/libconfig.so.$libVersion \
+	"$libDir"/libconfig++.so.$libVersion
 
 BUILD()
 {
 	autoreconf -fi
-	MAKEINFO=true \
-		runConfigure ./configure --disable-dependency-tracking
+	MAKEINFO=true runConfigure ./configure
 	make $jobArgs
 }