fix 511819: include extension point schemas in binary builds

This allows developers that extend a Capra binary build to make use of
the Eclipse validation features and have support in selecting the
correct extensions for each extension point.
diff --git a/org.eclipse.capra.core/build.properties b/org.eclipse.capra.core/build.properties
index 3960f18..0bfff55 100644
--- a/org.eclipse.capra.core/build.properties
+++ b/org.eclipse.capra.core/build.properties
@@ -12,4 +12,5 @@
 output.. = bin/
 bin.includes = META-INF/,\
                .,\
-               plugin.xml
+               plugin.xml,\
+               schema/
diff --git a/org.eclipse.capra.ui/build.properties b/org.eclipse.capra.ui/build.properties
index 8809dab..de6dc9d 100644
--- a/org.eclipse.capra.ui/build.properties
+++ b/org.eclipse.capra.ui/build.properties
@@ -14,5 +14,6 @@
                icons/,\
                .,\
                plugin.xml,\
-               plugin.properties
+               plugin.properties,\
+               schema/