Work around ARM and IAR optimization issue

Add a custom profile to work around an issue with the ARM and IAR
compilers, where the example appears to hang without any error. Building
the example with `-O1` (ARM) and `-Ol` (IAR), rather than the default of
`-Os` (ARM) and `-Ohz` (IAR), works as a workaround.

To use the custom profile with mbed-cli, use the --profile option.

    mbed compile -m CY8CKIT_062_WIFI_BT -t ARMC6 --profile mbed_profile.json

Arm internal reference: SDCTRESPONSE-3550

Author: Patater

getting-started/mbed_profile.json

@@ -0,0 +1,16 @@
+{
+    "ARMC6": {
+        "common": ["-c", "--target=arm-arm-none-eabi", "-mthumb", "-O1",
+                   "-Wno-armcc-pragma-push-pop", "-Wno-armcc-pragma-anon-unions",
+                   "-Wno-reserved-user-defined-literal", "-Wno-deprecated-register",
+                   "-DMULADDC_CANNOT_USE_R7", "-fdata-sections",
+                   "-fno-exceptions", "-MMD", "-D_LIBCPP_EXTERN_TEMPLATE(...)=",
+                   "-fshort-enums", "-fshort-wchar", "-DMBED_TRAP_ERRORS_ENABLED=1"]
+    },
+    "IAR": {
+        "common": [
+            "--no_wrap_diagnostics", "-e",
+            "--diag_suppress=Pa050,Pa084,Pa093,Pa082,Pe540", "-Ol", "--enable_restrict",
+             "-DMBED_TRAP_ERRORS_ENABLED=1"]
+    }
+}