Upgrade to GCC 7.

build/jam/repositories/HaikuPorts/x86_gcc2

@@ -27,8 +27,8 @@ RemotePackageRepository HaikuPorts
 	cdrtools_devel-3.02~a09-1
 	ctags-5.8-5
 	coreutils-8.24-1
-	curl-7.59.0-1
-	curl_devel-7.59.0-1
+	curl-7.60.0-1
+	curl_devel-7.60.0-1
 	cvs-1.12.13.1-8
 	diffutils-3.5-2
 	expat-2.2.1-2
@@ -73,7 +73,7 @@ RemotePackageRepository HaikuPorts
 	jpeg-9c-2
 	jpeg_devel-9c-2
 	keymapswitcher-1.2.7.11-4
-	less-530-1
+	less-531-1
 	libedit-20170329_3.1-1
 	libedit_devel-20170329_3.1-1
 	libffi-3.0.13-2
@@ -98,8 +98,8 @@ RemotePackageRepository HaikuPorts
 	libvorbis-1.3.5-5
 	libvorbis_devel-1.3.5-5
 	libvpx-1.0.0-2
-	libwebp-0.6.1-2
-	libwebp_devel-0.6.1-2
+	libwebp-1.0.0-1
+	libwebp_devel-1.0.0-1
 	libxml2-2.9.3-5
 	libxml2_devel-2.9.3-5
 	live555-2016.06.22-5
@@ -164,8 +164,8 @@ RemotePackageRepository HaikuPorts
 	bzip2_x86_devel-1.0.6-6
 	cdrtools_x86-3.02~a07-2
 	cdrtools_x86_devel-3.02~a07-2
-	curl_x86-7.59.0-1
-	curl_x86_devel-7.59.0-1
+	curl_x86-7.60.0-1
+	curl_x86_devel-7.60.0-1
 	expat_x86-2.2.5-1
 	expat_x86_devel-2.2.5-1
 	ffmpeg_x86-3.2.4-2
@@ -175,9 +175,9 @@ RemotePackageRepository HaikuPorts
 	fontconfig_x86_devel-2.12.6-2
 	freetype_x86-2.9-1
 	freetype_x86_devel-2.9-1
-	gcc_x86-5.4.0_2016_06_04-7
-	gcc_x86_syslibs-5.4.0_2016_06_04-7
-	gcc_x86_syslibs_devel-5.4.0_2016_06_04-7
+	gcc_x86-7.3.0_2018_05_01-1
+	gcc_x86_syslibs-7.3.0_2018_05_01-1
+	gcc_x86_syslibs_devel-7.3.0_2018_05_01-1
 	gettext_x86_libintl-0.19.8.1-5
 	giflib6_x86-5.0.5-4
 	giflib_x86-5.1.4-1
@@ -224,8 +224,8 @@ RemotePackageRepository HaikuPorts
 	libvpx3_x86-1.5.0-2
 	libvpx3_x86_devel-1.5.0-2
 	libwebp5_x86-0.4.4-2
-	libwebp_x86-0.6.1-2
-	libwebp_x86_devel-0.6.1-2
+	libwebp_x86-1.0.0-1
+	libwebp_x86_devel-1.0.0-1
 	libxml2_x86-2.9.3-5
 	libxml2_x86_devel-2.9.3-5
 	libxslt_x86-1.1.32-1