Merge pull request #355 from ARMmbed/update-docs-build-dir

Update documentation regarding build directory

Author: screamerbg

README.md

@@ -339,15 +339,15 @@ Allocated Stack: 32768 bytes
 Total Static RAM memory (data + bss): 10788 bytes
 Total RAM memory (data + bss + heap + stack): 109096 bytes
 Total Flash memory (text + data + misc): 66014 bytes
-Image: build/K64F/GCC_ARM/mbed-os-program.bin
+Image: BUILD/K64F/GCC_ARM/mbed-os-program.bin
 ```
 
 The arguments for *compile* are:
 
 * `-m <MCU>` to select a target.
 * `-t <TOOLCHAIN>` to select a toolchain (of those defined in `mbed_settings.py`, see above). The value can be either `ARM` (ARM Compiler 5), `GCC_ARM` (GNU ARM Embedded), or `IAR` (IAR Embedded Workbench for ARM).
 * `--source <SOURCE>` to select the source directory. The default is `.` (the current directorty). You can specify multiple source locations, even outside the program tree.
-* `--build <BUILD>` to select the build directory. Default: `build/` inside your program.
+* `--build <BUILD>` to select the build directory. Default: `BUILD/` inside your program.
 * `--options <OPTIONS>` to select compile options. Examples: "debug-info": will generate debugging information; "small-build" will use microlib/nanolib, but limit RTOS to single thread; "save-asm": will save the asm generated by the compiler
 * `--library` to compile the code as a [static .a/.ar library](#compiling-static-libraries).
 * `--config` to inspect the run-time compile configuration (see below).
@@ -509,14 +509,14 @@ The arguments to `test` are:
 * `--run` to only run the tests
 * `-n <TESTS_BY_NAME>` to limit the tests built or ran to a comma separated list (ex. test1,test2,test3)
 * `--source <SOURCE>` to select the source directory. Default is `.` (the current dir). You can specify multiple source locations, even outside the program tree.
-* `--build <BUILD>` to select the build directory. Default: `build/` inside your program.
+* `--build <BUILD>` to select the build directory. Default: `BUILD/` inside your program.
 * `--options <OPTIONS>` to select compile options. Examples: "debug-info": will generate debugging information; "small-build" will use microlib/nanolib, but limit RTOS to single thread; "save-asm": will save the asm generated by the compiler
 * `-c or --clean` to clean the build directory before compiling,
 * `--test-spec <TEST_SPEC>` to set the path for the test spec file used when building and running tests (the default path is the build directory).
 * `-v` or `--verbose` for verbose diagnostic output.
 * `-vv` or `--very_verbose` for very verbose diagnostic output.
 
-The compiled binaries and test artifacts can be found in the `build/tests/<TARGET>/<TOOLCHAIN>` directory of your program.
+The compiled binaries and test artifacts can be found in the `BUILD/tests/<TARGET>/<TOOLCHAIN>` directory of your program.
 
 #### Finding available tests