ANDROID: CMake/src changes to build on android-24

* Updated pom file generation: Generate pom files after all sensor
      library targets have been created - allows for dependencies
    * Changes for compiling on Android
    * Check for mraa build options: Look at symbols in mraa library to
      determine UPM build options (example: mraa_iio_init, mraa_firmata_init)
    * Add per target summary for C/C++/java/nodejs/python
    * Added hierarchy to fti include directory...
        old: #include "upm_voltage.h"
        new: #include "fti/upm_voltage.h"
    * Removed unimplemented methods from mpu9150 library and java example
    * Add utilities-c target for all c examples.  Most of the C examples
      rely on the upm_delay methods.  Add a dependency on the utilities-c
      target for all c examples.
    * Updated the examples/CMakeLists.txt to add dependencies passed via
      TARGETS to the target name parsed from the example name.  Also updated
      the interface example names to start with 'interfaces'.
    * Updated src/examples/CMakeLists.txt to ALWAYS remove examples from the
      example_src_list (moved this from end of function to beginning).

Signed-off-by: Noel Eck <noel.eck@intel.com>

examples/java/CMakeLists.txt

@@ -111,7 +111,9 @@ add_example(RotaryEncoderSample rotaryencoder)
 add_example(RPR220_intrSample rpr220)
 add_example(RPR220Sample rpr220)
 add_example(ST7735Sample st7735)
-add_example(StepMotorSample stepmotor)
+if (NOT ANDROID)
+  add_example(StepMotorSample stepmotor)
+endif ()
 add_example(TM1637Sample tm1637)
 add_example(TP401Sample gas)
 add_example(TSL2561Sample tsl2561)
@@ -145,7 +147,9 @@ if (BACNET_FOUND)
   add_example(T8100_Example t8100)
   add_example(TB7300_Example tb7300)
 endif()
-add_example(VCAP_Example vcap)
+if (JPEG_FOUND)
+  add_example(VCAP_Example vcap)
+endif()
 add_example(BMP280_Example bmp280)
 add_example(BNO055_Example bno055)
 add_example(BMX055_Example bmx055)