main: add -programmer flag

This flag is overloaded. It can be used in two ways:

  * Choosing the flash method to use (openocd, msd, command).
  * Choosing the OpenOCD programmer name.

For example, you can use one of these to use OpenOCD instead of the
mass-storage device programmer:

    tinygo flash -target=microbit -programmer=openocd
    tinygo flash -target=microbit -programmer=cmsis-dap

1 files changed, 1 insertions, 0 deletions

diff --git a/compileopts/options.go b/compileopts/options.go
index 891f21728..7336ee3fc 100644
--- a/compileopts/options.go
+++ b/compileopts/options.go
@@ -19,4 +19,5 @@ type Options struct {
 	WasmAbi       string
 	HeapSize      int64
 	TestConfig    TestConfig
+	Programmer    string
 }