[libsoup/build.fixes] meson.build: Look for libxml2.lib correctly on Visual Studio builds

[Chun-wei Fan <fanchunwei src gnome org>]

commit 3dfd4ce2bf00ce834f7b619a5b57dea8ca983e3f
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Mar 7 17:38:59 2019 +0800

    meson.build: Look for libxml2.lib correctly on Visual Studio builds
    
    On Visual Studio builds, it is not enough to look for 'xml2' for the
    library libxml2.lib, instead, we need to look for 'libxml2'.
    libxml2.lib is the library name that is produced by libxml2's NMake
    Makefiles.

 meson.build | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 6d738b94..177b5a4f 100644
--- a/meson.build
+++ b/meson.build
@@ -78,7 +78,8 @@ if not libxml_dep.found()
   # Note: The XML include dir needs to be within the INCLUDE envvar,
   # such as <INCLUDEDIR>\libxml2
   cc.has_header('libxml/tree.h')
-  libxml_dep = cc.find_library('xml2')
+  libxml2_libname = cc.get_id() == 'msvc' ? 'libxml2' : 'xml2'
+  libxml_dep = cc.find_library(libxml2_libname)
 endif
 
 cdata = configuration_data()