[newlib-cygwin] Set __IEEE_LITTLE_ENDIAN for _XTENSA_EL__ (ESP32)

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=ed2a469cdd281182fe2a9c2c6fcb3da3fa659979

commit ed2a469cdd281182fe2a9c2c6fcb3da3fa659979
Author: Keith Packard <keithp@keithp.com>
Date:   Mon Dec 16 13:56:11 2019 -0800

    Set __IEEE_LITTLE_ENDIAN for _XTENSA_EL__ (ESP32)
    
    Signed-off-by: Keith Packard <keithp@keithp.com>

Diff:
---
 newlib/libc/include/machine/ieeefp.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/newlib/libc/include/machine/ieeefp.h b/newlib/libc/include/machine/ieeefp.h
index 536ac11..aa8a190 100644
--- a/newlib/libc/include/machine/ieeefp.h
+++ b/newlib/libc/include/machine/ieeefp.h
@@ -460,6 +460,10 @@
 #define __IEEE_LITTLE_ENDIAN
 #endif
 
+#ifdef __XTENSA_EL__
+#define __IEEE_LITTLE_ENDIAN
+#endif
+
 #ifdef __CYGWIN__
 #define __OBSOLETE_MATH_DEFAULT 0
 #endif