JDK-8172973 removes the warning emitted at run-time but --add-exports specified at compile-time shall be removed.

Compiling 4 files for BUILD_JIGSAW_TOOLS
warning: [options] module name in --add-exports option not found: jdk.jdeps

Simple patch:

diff --git a/make/CompileModuleTools.gmk b/make/CompileModuleTools.gmk
--- a/make/CompileModuleTools.gmk
+++ b/make/CompileModuleTools.gmk
@@ -37,6 +37,5 @@
                build/tools/jigsaw, \
    BIN := $(TOOLS_CLASSES_DIR), \
    ADD_JAVAC_FLAGS := \
- --add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED \
        --add-exports java.base/jdk.internal.module=ALL-UNNAMED \
))