CMake: Building Dynamic Framework on iOS (#8009)

* Updated python script with dynamic parameter

Updated python script to build static library by default

Updated python script to include bitcode flag

Added bitcode flag to c flags

Fixed directories and targets with static

Bitcode parameter fixed

Fixed script for static library

Fixed parameters in build function

Updated cmake common toolchain

Added changes to OpenCV Utils

Updates to cmake

Added cache internal

Updates to common toolchain

Fixed path in framework destination and added UIKit dependency

Dynamic plist for framework

Lib version removed hardcoded value

Removed trailing whitespace in toolchain

* Removed trailing whitespace

* Fixed typo in comment

* Renamed bitcode variable to bitcodedisabled

* Fixed target device family

"install DIRECTORY does not allow "COMPONENT" after PATTERN or REGEX."

Unfortunately there is no stable support for installation of PDB files in CMake.
This patch is just eliminate problems with modern versions.

(2.4) Backports from master branch (#7854)

Useful for debug purposes:
    cmake -DDEBUG_POST="ocv_cmake_dump_vars(CUDA)" .
    cmake -DCMAKE_PRE="ocv_cmake_dump_vars(\"OPENCL|opencl\")" .

1) fix include directories
2) don't use PCH for source file with custom COMPILE_FLAGS

Also put "object" targets to off by default (they doesn't work well)

CMake doesn't work with empty paths ("") or paths which contains "./"

CPack can't work with absolute paths.

- removed OpenCV_LIB_DIR* vars (they are broken and not required anymore)
- OpenCVConfig.cmake doesn't contain ANDROID/CUDA code if there is no such support
- removed OpenCV2_INCLUDE_DIRS_CONFIGCMAKE, merged into OpenCV_INCLUDE_DIRS_CONFIGCMAKE
- fix hard-coded relative paths for OpenCV_INSTALL_PATH
- removed OpenCV_TBB_ARCH
- switch OpenCVConfig.cmake into 2-level mode for Android SDK

Useful for debug purposes:
    cmake -DDEBUG_POST="ocv_cmake_dump_vars(CUDA)" .
    cmake -DCMAKE_PRE="ocv_cmake_dump_vars(\"OPENCL|opencl\")" .

(cherry picked from commit 937a096b)

Pdb file support was changed in CMake 2.8.12, support was added in CMake 3.1.0 to work around the problems created by the change introduced in CMake 2.8.12.

Scripts are updated for Linux-based (Ubuntu 14.04) mingw cross-compilation (full stack of scripts provided)
Part of these scripts may work under Windows installation of MinGW, but it is not supported.

FFMPEG update: 2.7.1
Added OpenH264 Cisco binaries support for H264 encoding: v1.4.0