configure: add sources matching names from vcpkg

It's possible to use vcpkg using the -I and -L arguments, but
some of their libraries have different names than what we look for
during configure, so add in those variations.

Change-Id: Iee37197228cc0f15442ecd7ec4fc761f4d526e1d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

configure.json

@@ -161,6 +161,7 @@
             },
             "sources": [
                 { "libs": "-lzdll", "condition": "config.msvc" },
+                { "libs": "-lzlib", "condition": "config.msvc" },
                 { "libs": "-lz", "condition": "!config.msvc" }
             ]
         },

src/gui/configure.json

@@ -294,7 +294,7 @@
             },
             "sources": [
                 { "libs": "-llibjpeg", "condition": "config.msvc" },
-                { "libs": "-ljpeg", "condition": "!config.msvc" }
+                "-ljpeg"
             ]
         },
         "libpng": {
@@ -305,7 +305,9 @@
             },
             "sources": [
                 { "type": "pkgConfig", "args": "libpng" },
+                { "libs": "-llibpng16", "condition": "config.msvc" },
                 { "libs": "-llibpng", "condition": "config.msvc" },
+                { "libs": "-lpng16", "condition": "!config.msvc" },
                 { "libs": "-lpng", "condition": "!config.msvc" }
             ],
             "use": [