Fix build errors of applications using nnfw.h:
```
[ 15s] /usr/include/nnfw.h:162:35: error: unknown type name 'nnfw_tensorinfo'
[ 15s] nnfw_tensorinfo *tensor_info);
[ 15s] ^~~~~~~~~~~~~~~
[ 15s] /usr/include/nnfw.h:174:36: error: unknown type name 'nnfw_tensorinfo'
[ 15s] nnfw_tensorinfo *tensor_info);
[ 15s] ^~~~~~~~~~~~~~~
```
Fixes #7715
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
#endif
typedef struct nnfw_session nnfw_session;
+typedef struct nnfw_tensorinfo nnfw_tensorinfo;
typedef enum {
NNFW_TYPE_TENSOR_FLOAT32 = 0,