File eclipse-gcc10.patch of Package eclipse-swt

--- "eclipse-platform-sources-I20180906-0745/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/library/os_custom.h"	2020-06-04 09:40:50.445771866 +0200
+++ "eclipse-platform-sources-I20180906-0745/eclipse.platform.swt/bundles/org.eclipse.swt/Eclipse SWT PI/gtk/library/os_custom.h"	2020-06-04 09:41:22.105960640 +0200
@@ -162,7 +162,7 @@
 glong g_utf8_offset_to_utf16_offset(const gchar*, glong);
 
 // Cached JVM pointer: see bug 521487.
-JavaVM *cached_jvm;
+extern JavaVM *cached_jvm;
 
 #ifndef NO_SwtFixed