Makefiles: Support py/*.h includes per #1022.
diff --git a/bare-arm/Makefile b/bare-arm/Makefile
index eeaaf42..2809b18 100644
--- a/bare-arm/Makefile
+++ b/bare-arm/Makefile
@@ -9,6 +9,7 @@
CROSS_COMPILE = arm-none-eabi-
INC = -I.
+INC += -I..
INC += -I$(PY_SRC)
INC += -I$(BUILD)
diff --git a/qemu-arm/Makefile b/qemu-arm/Makefile
index 9005380..bb0880c 100644
--- a/qemu-arm/Makefile
+++ b/qemu-arm/Makefile
@@ -10,6 +10,7 @@
CROSS_COMPILE = arm-none-eabi-
INC = -I.
+INC += -I..
INC += -I$(PY_SRC)
INC += -I$(BUILD)
diff --git a/stmhal/Makefile b/stmhal/Makefile
index 9c2c23c..98f31eb 100644
--- a/stmhal/Makefile
+++ b/stmhal/Makefile
@@ -32,6 +32,7 @@
CROSS_COMPILE = arm-none-eabi-
INC = -I.
+INC += -I..
INC += -I$(PY_SRC)
INC += -I$(BUILD)
INC += -I$(CMSIS_DIR)/inc
diff --git a/teensy/Makefile b/teensy/Makefile
index 5ea4c9d..20ba419 100644
--- a/teensy/Makefile
+++ b/teensy/Makefile
@@ -30,6 +30,7 @@
CFLAGS_CORTEX_M4 = -mthumb -mtune=cortex-m4 -mcpu=cortex-m4 -msoft-float -mfloat-abi=soft -fsingle-precision-constant -Wdouble-promotion $(CFLAGS_TEENSY)
INC = -I.
+INC += -I..
INC += -I$(PY_SRC)
INC += -I../stmhal
INC += -I$(BUILD)
diff --git a/unix-cpy/Makefile b/unix-cpy/Makefile
index eb40888..6a60c35 100644
--- a/unix-cpy/Makefile
+++ b/unix-cpy/Makefile
@@ -7,6 +7,7 @@
include ../py/py.mk
INC = -I.
+INC += -I..
INC += -I$(PY_SRC)
INC += -I$(BUILD)
diff --git a/unix/Makefile b/unix/Makefile
index de3aef3..bfd9497 100644
--- a/unix/Makefile
+++ b/unix/Makefile
@@ -14,6 +14,7 @@
include ../py/py.mk
INC = -I.
+INC += -I..
INC += -I$(PY_SRC)
INC += -I$(BUILD)
diff --git a/windows/Makefile b/windows/Makefile
index 28b73d6..f73e166 100644
--- a/windows/Makefile
+++ b/windows/Makefile
@@ -11,6 +11,7 @@
include ../py/py.mk
INC = -I.
+INC += -I..
INC += -I$(PY_SRC)
INC += -I$(BUILD)