Rename "generic" -> "bluepill" (common name)

hal/targets.json

@@ -1684,13 +1684,13 @@
         "device_has": ["ANALOGIN", "I2C", "I2CSLAVE", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH"],
         "default_build": "standard"
     },
-    "GENERIC_F103C8": {
+    "BLUEPILL_F103C8": {
         "core": "Cortex-M3",
         "default_toolchain": "GCC_ARM",
         "extra_labels": ["STM", "STM32F1", "STM32F103C8"],
         "supported_toolchains": ["GCC_ARM"],
         "inherits": ["Target"],
-        "progen": {"target": "generic-f103c8"},
+        "progen": {"target": "bluepill-f103c8"},
         "features": ["ANALOGIN", "CAN", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES"]
     }
 }