dexdump: add page (#3563)

pages/common/dexdump.md

@@ -0,0 +1,19 @@
+# dexdump
+
+> Display information about Android DEX files.
+
+- Extract classes and methods from an APK file:
+
+`dexdump {{path/to/file.apk}}`
+
+- Display header information of DEX files contained in an APK file:
+
+`dexdump -f {{path/to/file.apk}}`
+
+- Display the dis-assembled output of executable sections:
+
+`dexdump -d {{path/to/file.apk}}`
+
+- Output results to a file:
+
+`dexdump -o {{path/to/file}} {{path/to/file.apk}}`