build: fix case in lib names

ninja on Windows chokes if libs are named .Lib (Capital L)

PR-URL: #12522
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>

Author: refack

tools/icu/icu-generic.gyp

@@ -464,7 +464,7 @@
         'conditions': [
           [ 'OS=="win"', {
             'link_settings': {
-              'libraries': [ '-lAdvAPI32.Lib', '-lUser32.lib' ],
+              'libraries': [ '-lAdvAPI32.lib', '-lUser32.lib' ],
             },
           }],
         ],
@@ -518,7 +518,7 @@
         'conditions': [
           [ 'OS=="win"', {
             'link_settings': {
-              'libraries': [ '-lAdvAPI32.Lib', '-lUser32.lib' ],
+              'libraries': [ '-lAdvAPI32.lib', '-lUser32.lib' ],
             },
           }],
         ],