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>

src/l3gd20/CMakeLists.txt

@@ -1,5 +1,7 @@
-set (libname "l3gd20")
-set (libdescription "Tri-axis Digital Gyroscope")
-set (module_src ${libname}.cxx)
-set (module_hpp ${libname}.hpp)
-upm_module_init(mraa)
+if (MRAA_IIO_FOUND)
+    set (libname "l3gd20")
+    set (libdescription "Tri-axis Digital Gyroscope")
+    set (module_src ${libname}.cxx)
+    set (module_hpp ${libname}.hpp)
+    upm_module_init(mraa)
+endif (MRAA_IIO_FOUND)

src/l3gd20/l3gd20.cxx

@@ -138,11 +138,11 @@ L3GD20::L3GD20(int bus, int addr)
     {
       throw std::runtime_error(std::string(__FUNCTION__) +
                                ": Invalid Chip ID: expected "
-                               + std::to_string(L3GD20_DEFAULT_CHIP_ID)
+                               + to_string(L3GD20_DEFAULT_CHIP_ID)
                                + " or "
-                               + std::to_string(L3GD20H_DEFAULT_CHIP_ID)
+                               + to_string(L3GD20H_DEFAULT_CHIP_ID)
                                + ", got "
-                               + std::to_string(int(cid)));
+                               + to_string(int(cid)));
       return;
     }
 
@@ -282,7 +282,7 @@ void L3GD20::update()
     {
       throw std::runtime_error(std::string(__FUNCTION__)
                                + ": readRegs() failed to read "
-                               + std::to_string(bufLen)
+                               + to_string(bufLen)
                                + " bytes");
     }